Gas-engine.



A. M. GIBSON.

GAS-ENGINE.'

APPLICATION FILED JAN. 4, 1909.

1,043,221, Patented N0v.5, 1912.

4 SHEETS-SHEET 1 A. M GIBSON.

I GAS ENGINE. APPLICATION run In. 4., mos.

' 1'',04'3321. Patentd N0v.5,1912.

4 sums-sum 2.

v A. M. GIBSON.-

' GAS ENGINE. APPLICATION FILED JAN. 4, mop.

mm v1m. 5, 1912 A. M.- GIBSON.

GAS ENGINE. ufnmnmn run an. '4, 1901).

' v Patented NOV. 5, 1 912.

4 BHBETHEI BET 4.

" im e' s or-cmei mun-am. I

( mme s pecliicetion of Letters f aunt.

Be it known that'iI, ADAM M. Gmsoii; Ia,

citizen of the United States','residing at Chi-l *eago,

in the-'ceunty of Cook'a'nd State of Illinois, hai e'j invented certainnew engine and has for its ob]ect-tc provide an engineof. the

explosive type which shall be simple and into construcfleconomical ofincl;-

minimized. 'More particularly, the invention has for an object toprovide a; twotcycle, explosive' engine 'provided with an exheust port,the I eifectiye size of which canbevaried'aecordF' ing toithe speed-atwhich theengin'e run-' this const-ru ning;

the expnlsionbf allofthe burnt to obtain gases, even when the speed ishigh,1.a-nd' to appreciable. 'escalpe v y 4 qt-lomofjthe' exhaust valve;and Fig;-5 isfe prevent et all times any of the charge.

i The invention hes for n fllrthertobject to Y modified Construction;of; thefrfee'tl cylinder.

nrow ide a peculiar"construction.'for the ex- I blosl'on cylinder; and apeculiar-location of the intake and exhaust ports of thesam'e, wherebythe incoming charge efl'ectnellyex- 'pels the burnt charge.-

The invention -"'has .f0r a inrther object to proviclea' fee'cl cylinderhaving a; piston workin sinuiltaneously withIt-he piston of the exposi'on' cylinder,:thje feedeylinder' being so connected withtheexplosion cylinderthet the charge first-drawn into the feed cha heris compressed. and forced: into "the expilcsinn-cyllnder under pressure,thus nsur ng the expulsion or the. burnt gases anclthe 'p b'sioncylinder, measured by.correspondinflg positions ofthe respectivepistons; and I f ,throat' 20, preferably;

- th'eintake p0rt '21,i-whichis controlled-by the Irieens may beprovided {for varying-these itective volumetric contents or thefeed-cylintler inordert'o vary the pressure a't whic the charge isint-reduced into the explosioncylinder.

The invention livrther ccntetnplaiteshn ranging the-two cylinders in line witheach ether and employing a' sisting of a single, rigid'structure,'and"1onr=,

nalinglthe crank shaft- I ton and out of linewiththe'cmnecting rod."

and; use-f ful' Improvements in- Gas-Engines, ofwhich the followingi'sa, specification.

My invent-ion relates-to 'a'jgas y e? as in the claims appendedlthereto.

ct-ion' making .it possible filling of the explosionbylinder with; iresh gas. To this end, the feecl "c'yllnder 1s, n'tieferably of greateryolumexthanWthe e'x-Q I proper time,

s t n x i I I aises; a

. f the. pie;-

The invention-he'siforla. secondary, but

.nevertheles's'fim ortant 'objeetfto provide a; in vvficht-hedr-iyen-sliaft may be I Q S Clllat eil back and forth; '.lessthan" a. full Fr'ew olution, when .desired,..insteed. 10f being" rotatedr continuously in "the same direction.

gas engine The inventionfhgsfor further objects such and errangement'sin' gas "enginesg 'a'nd -paliticnlarly 1n gas engines-of the; two-cyclewill be described 'inithe epcolnp any}- new and improved constructions;lideviees 5 One embodiment} of. m'y i n entiojn, is shown.- m1

wherein +4 i F gure' 1 is "a; r sidef f'elei'etion' of" a g s en :gi neof the two cycle'type, -,'para-tus and its" circuits =be1'ng,

shown indiegrem. Fig.2 is'ziipl a'n viewjof I however,

the engine. ;Fig. .3'is a longitudinal, ver

ig iti n P.-

tical section; 'Fig;l4 is e'd'et-ail, cross seedetail,= longitudinalse'cti'oni,illustrating a Lik characters. of referencejind we like; 3

.pzirts in I the several figures. of the A represents the-explosioncylinder, Bthe v I a connecting nipe'leading' from the-letter tb theformer,'D the double ra wing's.

piston, Ethe spark coils andzF the battery for these-me. Theexplosicncylinder A is constructed;- as here-shown, of the; castings l0 and 11,the g I -Water chamber '12-, to which leedt-he pipesj former "providedwith the 13., The cast ng 11 i-s' perforated fen-the. stem 1415f theintake} valve 1'5 the Valve being heldegeinst its'se'atjlfi by,a.spring:17 abutting against anfadjustable;nut 18, which The end of might be.employed.

of less diameter than check valve. This contr'ectetl throatis-pro-Yduced,j-as I haireshown it,'by c aus ngther,cylinderto,taper'eti'theend. y

.The charge, itjwi-ll be understood, is com-- pressed in the Lfeed 1cylinder and, at the r wed, through theiconnectlng into the explosion.cylinders-a t theend thereof. Thecontracte'd throat of the cylindercauses the: incoming charge to. be concentrated directly back ofthebod-y of'burnt gases and the-Widening of the cyl-i inder beyond thethro'atcauses jas I'appr'e bend it, a's'preading of the incoming gases'behind and -against the burnt charge, with "the result of. 'veryeffectively expelling all of the burnt gases from the explosioncylinder. 4 The exhaust port 22 extends through the under side of thecylinder and is located preferably at some little distance from the endpf the-cylinder. One of theiinportant objects of my invention is toprovide means" .for varying the effectivesizeo'f this port in accordancewith the speed at which the englue is running." To this end, in theconstruction shown, a valve casing-23 18 provided on the under side ofthe cast ng 10,

- in which i sflocated a rotatable valve a pre ferred construction ofwhlch isshown-in ,i Figs. 3 and a. The Valve consists of the. end

pieces 24,24 connected by the segments. 255 25, which are spaced apart,making a port 26 of the same width as port22. -Th-is valve piece'ismounted on a shaft '27. on which .is

. pinned a disk '28, which closes the valve --chamber- :23' at one end,the other end-being closed. by adisk 29, against which presses a sarin30,'the tension of which Ina be ad' justed by" nut 31. By rotating thisvalve one of the segments inay be'rnade to par: tially close the port 22and I have provided means, which will be described later, for

- effecting this adjustment in accordancew-ith.

the speed atwhich ,the engine is'runnin'g.

Any other'construction of valvemight be" I, employed in this connection.

' The feed cylinder B is composed, as

shown.,.of. the castings 32, 83 and 34:, suitably bolted together, asshown. The .cylinders A and B are bolted to a central casting 35 with anopening at the top which isprefi I casting providedat' the ends with theheads 37. and Packing of any desired form connecting'rod and cranks arewithin'the erably provided with the removable 36.

' The piston D may be made of a single .inay be employed, such as thepacking rings 39. The casting forming the piston is hollow and has anopening in the top,and the piston.- I have shown the driven shaft 4Qof'the. enginej provided' ith cranks 41, .to the crank pin 43 of whichis'conne'cted in the 11SU3l-11121BI18I,-il'18 connecting rod 42,

which isconnected *to' the forward end of thepiston bythe pin 44L; Itwill be seen that the crank shaft is journaled above the i point fofattachment-of the connecting rod withthe' piston: l Bythisarrangeniennndun ing thewvorking'part'of the stroke, theconnectin'g' r0 ,d .i's substantially i in" "line with the :5 inostffavorablelposition The inclinas.

' line of travel of the piston; which; of course,

little importance.

tion of'the connecting rodiis,"of conrsehi n creased onv the forwardstroke, but that is of The feed cylinder B is coiinected by a pipe 45with the carbureter G', of any desired and air is drawninto. theJfeedchamber .7? construction. As the .carbureter forms -initself no part ofmy invention, it is j not shown nor described in'detail'. -Wh en:the;piston D'moves forward; a charge of gas..

, through pipe oy'which charge-is compressed 5 bytheback stroke of thepistonand is forced i through the pipe connection 'G into the explosioncylinder A. Preferably Ixnake' the feed cylinder B of grea ter diameterthan 'the.

explosion cylinder,- so thatthere'is always more than enough gas in thefeed cylir'ider.

'q'to fill the explosion cylinder, as well as thei connecting pipe C.This insures afull Theengine will operate successfully withcharge.

out a separate ralve for the outlet from cylinder B, Such avalveniayihowever, be

employed. I have shown in the drawings a suitable valve *which 'issoconstructed as to openust at the proper time, The casting is formed withthe internal web 443, cone; stitnting anoutletport ti'gto which pifpe Cconnected, and affording a seat .418 or the diskvalve 49, the ste1n50 ofwhich ex-' tends through ape'rforation in the web, .A, spring 51 holdsthe disk against its sea-ta. With a back stroke of piston D, the incylinder B-is'compressed,'this pressure, as

sis/ting the springin holding thewalve'to its sea-t. Before the pistonreachc slhe' end of the strokegit engages with the stern-of the valve,forcing the valve open long. enough toallow the charge, which .isnnderlveryronsiderable pressure; to escape through pipe G i and into theexplosion cylinder. As there willbe need of an initial'adjustmentof-this tern or the the end of. stem 50, .As i ted, the entire valvemight be. omitted; as the check valve- 15" operates against thepressurein cylinder i A and 1S arrangedas to open onlywhenlhe pressure.is lowered afte'r'theexplosion has i taken place I v In Fig. 5;I"haveshown" a modifiedand' preferred construction of the feed cylinder.

omitted and which has advantages not pos gassed y e construction .showninflt-he oth r features feedcyhnder is in this case, provided withasuitahly fp'acked disk 53," which can beadjustcdj-to; variousposit-ions in the cylinder by thcset screw 54, which is threa'dedthroughthe.

end of the cylinder.' The position of the disk"'53 will "obviouslyvarythe -.voh i metri'c 1 in which the adjustable timing valve may bebattery circuit between this eccentric and 5 "from the battery contentsof thecylinder for any given position of the piston, indicated in thisfigure by D, which will, of course, vary the pressure and-amount of thechar e taken into pacit-y-tha'n cylinder A...

p, I prefr to connect the valve controlling-" the exhaust 0 I ort of theexplosion cylinde withthe lgmtion apparatus of the engi so that theeffective size of the exhaust poi will be increased as'the spark isadvanced and the speed of the engine increased. To

' this end, I provide the driven shaft 40 with on the end of thesc'rew,of theliiiks 69 and..70,ithe latter being pref- 3 72 leading'from pin62,. which, with the bar .nected one. end of a bar dle 57' toward theright (Fig. 1)

an eccentric and makethe contact in the n adjustable. dev-ice, theposition of which 01s the position-of the valve. jLoose e shaft 'is a"counts having a hanwhich can'be set at various angular ns upon a toothedsector 58, the hanng provided with a tooth 59 which is ed by the thumbpiece 60 in the ual'to constructions of this sort. The

collar is provided with the arm 61, in. the

end of which 1s pivoted a pin 62, these parts being completely insulatedby means'of the washer-6 3, of rubber compound or other in sulatingmaterial. To the pin- 62 is conofwhich rests on thefin'sulating button65 66, which can be adjustably set in a pin 67 pivoted to the [farm68flextending from collar'56 in the opposite direction., from arm 61.The arm 68. is connected iwith the shaft 27 of the valvecontrolling-exhaust port 22 by means erably secured to" shaft 27 by theset screw 71,'which permitsan initial adjustment of the links. r 1

The battery circuit consists of the wire 64, is completely insulatedfrom the rest of the machine, to'the battery F; wire '73 leads' to oneprimary terminal of the spark coil box (the latter being of any desiredconstruction and not here shown in detail) wire 74 from theother'primary terminal of the spark coil box to the engine; the wires 75 and 7 6 lead from the sec-v ondary terminals of the spark Qcoil,respec- .tively, to a' point spark plug H. 55.

on the engine andthe desired type and extends into the explosioncylinder at its forward end 1n/..tlie usual manner.

As themoveinent of the operating han- :will slow down thespark and a;movement in the opposit-e direction will advance it, then, w th theslowing of the spark, the exhaust valve will be rocked so as tobring'theright hand segment 25 (Fig. 3') partly over the port 22, thusdecreasingthe effective size of the:

creased by a rotationof the valve in the man- 64;, the other endThelatter may be of any,

ignition apparatus.-

opening through which the interionof the explosion cylinder is in'communication with the atmosphere; As the spark is advanced, the size fthe opening will be gradually inopposite direction, It has beencustomary, so far as I am re, to govern gas engines at the point iichthe charge is first taken into the e. I have found that there are ad-'ges, particularly in the construction of ihe above described, ingoverning the amount of the charge which goes to the explosion cylinderat a point between the two cylinders. Vithoutconfining myself to anyparticular form of valve or governor, l have shown apparatus forcontrolling the supply of gas which goes to the-explosion c vl- -inderwithout directly affecting the taking in of 'the gasin'the feedcylinder. In the pipe 6 is located a valve cas ng 77, 1n which.

is a sliding valve-consisting of the solid disks 7S and the guides 79,whichare spaced apart. This valve is connected to the rod. 80 of agovernor J o ordinary type. which need-not be described in detail, thedriven pulley 81 of this governor being connected by abelt 82 with apulley 83-631 the. driven shaft 40 of the engine. As the engine speedsup, the rod 80 'of the governor and shuts 01f.- to a more or lessextent, the inflow of gas into the explosion cylinder.-

The operation of the engine isas follows: hen the piston .moves forward,the. charge is drawn'into cylinder. B from the carbureter G. A backwardmovement of the piston compresses the in cylinder B. and, (in case thetiming valve is employed), when the piston head 38 reaches the screw-52, valve 49 is opened against the spring 51 and the pressure in thecylinder and the charge is driven around through pipe "C, past the valve78 and valve 15, into the end of the exploslon cylinder. The partof thepiston in cylinder A has by this time'unv covered port- 22 and theincoming charge,

which is concentrated by passing through ,the contracted throat at theend of the cylinder, expands behind the body of burnt gases and, asIapprehend it. has a scouring action around the curved surface within thethroat, and thus forces the body of burnt gases through the cylinder andout of the exhaust port 22. The cross sectional area of this opening hasbeen determined by the position of handle 57; whichcontrols the hen thespark-is, slow, the port 22 ispartly closed, because, in such case, theengine'is. running slow and. there.

is ample time foi. the expulsion of hll of the burnt gases. The openingshould be no larger than is necessary to. insure -a cleancylinder,fbec'ause, if too large. there is danger that some of the freshcharge will escape. As the engine is'speeded up, the

crom sectienal area of the opening is in The I creased by the rotationoflthe valve. increased speed of the engine makes a larger outlet forthe burnt gases necessary and, if the initial adjustment of the valve,

.Which can. be'efi'e'cted by means of the set 1 screw 71, is correct,the size of the exhaust opening Will-be so proportioned to the sparkthat for all speeds the burnt gases will be 19 completely expelledwithout material loss ottthe fresh charge. 'll itha forward movementofthe piston, a new charge is taken into cylinder B and the chargereceived in cylinder A is compressed, the piston as soon as it movesforward closing the exhaust port 22, When the piston reaches the properpoint, this being determined by the positionof handle 57, the charge isexploded and the pistondriven back, as above described. The fiopositionof the handle 57 times the spark relative tothe position. otthe piston.by shifting the angular :-sit.imn oi the bar 64 relative to theshnft40., so that the enlarged part of the eccentric comes into contact withthe barsooner or later in its revolution, as the'case may be". The valvecontrolling the rotation as the bar 64 when the position of handle 57 ischanged'.- lVhen the eccentric comes into, contact with bar 64, thecircuit is closed through the primary coil of the spar'ker, currentbeing induced in the sec-. ondary, which produces the spark in theexplosion cylinder;

lt'will be. seen that, by

in such anianner as to drive the whole body of burnt gases through thecylinder toward' the exhaust port, the forward end of; the

cylinders, where the spark is produced, is sure to be filled wlth cleangas, even though,

.for some reason, the burnt'gases are not com pletely exhausted. Suchburnt as may remain will be crowded away from the fori ard end. ot thecy inder, sothat there is no danger of the engine missing fire. it anynew charge at all is introduced intothe cylinder. v By'making-the pistona single, rigid-strum ture which isguidedjat each end by contact withthe eylinders,-tl1at practically a. combined piston and cross head, Iavoid any rocking motion ofthe piston, likely to cause wear and noise.This double piston is'always workingugainst a pressure of gas at eachend and, for this reason the engine'is very t niet in its action, thecrank connections particularly being kept, from rattlin The space withincasting 36' beneath the. piston can be filled with oil, so that'thepiston will be self-oilingz By journaling the crank shaft above thecenter of. the piston, the connecting rod is .in the most: favorableposltion for doing work during the working part of its stroke,

tween the two' cylinders, I insure. keeping exhaust is given just thesame amount or" introducing the fresh chargento theend of the cylinderC, (assuming that valve l9 is omitted); but

accuse because it is in a. substantially horizontal position through themovement backward of the piston. This involves, of course, having theconnecting rod at. an increased inclination during a part of the forwardstroke, but that is a mat-ter'of littlei-mportance, because at this timethe parts arc moving by'their momentum and because of the pressure incylinder B. i

By governing the charge at'a point be'- the feed cylinder full of gas,whichmak e's the engine easier to start after a momentary stop.()rdi'narilyithas been the custom'to govern the. engine at thecarbureter or in take, which means that, afterthe governor. has acted tostop the inflow for any reason'a both the explosion cylinder and the'feed cylinder, or its equivalent, have to be filled 'up with gas beforethe engine "can start or- 5 continue its regular. operation. The feedcylinder acts notonly to force the charge .i nto the explosion'cylinderunder pressure,

but also as a mixer. This latter function is increased when the cylinderis ,made of greater volumethan the explosion cylinder, because there isthen in'the feed cylinder always a certain amount of gas which has been.churned upby a. previous movement of the piston. When the constructionof feed cylinder shown in Fig. 5 is employed in connection withthe'features of. my engine, several advantages are obtained. .The timingvalve controlling the 'outlet from the. feed cylinder may be omitted. Itwill be obs rved that valve 15 which controls the 'inflo the charge toexplosioncylinder nece arily operates againstthe pressure in the ylin.der so that this arrangement. itself imes the charging of the explosioncylind A= back stroke of the piston. compresses the gas in the 'feedcylinder and in connectirigfprpe;

until there has been, a reduction of pressure.

in cylinder A, caused by 'the'exhausting of burnt gases through port 22,no fresh charge Y will. pass valve'15. Inthe construction of Fig. 5,.theadjust-ability of disk'53 by verving the pressurei'n the feed cylinder,which .pressure can be thus made more or less, 'a-ccording to whetherthe engine is running at high speed or low speed, takes the place of theadjustment of the timing valve shown inFig. 3. If-t he engine is torunfa't 100 revolutions, the-disk will be relativelyfar back in the feedcylinder. Ifthe engine is to run at 500 revolutions, the'disk may beadvanced, in which case a greater pressure will be exerted on the backofvalve; 15,

tending to open this valve moreonic'kly when the engine 18 thus runningat' the higher rate of speed. Under such circumstances there IS nodanger that the, in-

creased'pressure'of the charge entering the explosion cylinder willcause a loss through the exhaust portbecause the .opening through thisport will be made smaller when the engine running at a high rate ofspeed.

In four cycle engines, in order to obtain greater pressure in thecylinder of a given engine, it is necessary to decrease the volu metriccontents of the cylinder by making, for example, the cylindershorter. In

my construction of engine, the pressure in the explosion cylinder may beincreased without decreasing the volumetric contents of such cylinder.By a forward adjustment ofdisk 53 the pressu're in tliefeed cylin derwill be increased which will give an in,- crease both of 'the amount ofgas and of pressure in .the explosion cylinder, pros vided, of course,-the feedcylinder is always.

larger than the explosion cylinder. This adjustable feature is alsovaluable in adapting the engine to different fuels. Less pressure is'needed 'when the fuel is, gasolene, ,for example, than when ordinaryilluminating gas is used. here the'charge is timed by relative pressureson opposite sides of the valve 15, a full cylinder is insured,,,

' even'under varying conditions. Even after the' piston has begun tomove forward and closed the exhaust port, the charge will coir. tinuecoming into the cylinder, provided the pressure warrants it.

An engine constructed as above described is capable of being operated togive 'the crank shaft'an oscillating instead of a rd tary movement, thatis, of turning the crank shaft back andforth for a fraction of arevolution It is very desirable to have an engine'which can be made toso operate, as, for example, when a reciprocating movement is to begiven the driven part, as 111 pumping, churning or the like. Bystarting.

theengine with. an advanced spark, I can obtain this oscillatingIIIOVQIDBIlt of the crank shaft. The crank .niakes somewhat more than ahalf revolution untilit gets approximately to the position of thegreatest inclination of the piston rod, and then moves back again in theopposite direction.

The force of this oscillatin movement is very considerable. The capacityof the engine to so operate is due, as I apprehend it, partly to theposit-ion of thejournals of the crank shaft above the center of thepiston, and partly'to the balancing of the piston by the bodies of gasin the two cylinders.

. I do not limit myself to the particular de vices, constructions andarrangements shown 'and described, as modifications might be.

devised which would comewithin my invention as defined by the claims.

I claim:

1. A gas engine, comprising an explosion cylinder having an exhaustopening, and means for varying by one operation the able ignitiondevice, and a connection between the ignition device and the valve,whereby the position of one conditions that of the'other.

vary the effective size of the port, an ignition device comprising amember adapted to be member.

' I 5, A gas englne, comprisinganexplosion cylinder having an exhaustport, 'a valve to ,rivary the efiective size of the'port, an ignitiondevice comprising an eccentric. driven by the "set at differentpositionswith respect to eccentric f l l l v contact evice and thevalve.

6; A gas engine, comprising; an explosion vary th jettective size of.said port, an eccentric,ti'xecl on the shaft of the engine, a contactdevice .ro tatably mountedon said shaft, means for setting saidcontactde'vice and said valve; v i

7. A gas engine, comprising an explosion cylinder and piston, saidcylinder having port in the sideof the cylinder; mean introducing thecharge ,into. the cyli under pressure,a timing device .for the thepositionofthe timing device.

, 8..A'gas engine, comprising an explosion cylinder with anintake portatone end, a feed cylinder, a .connect1ng pipe leading the side of theexplosion cylinder. a timing the efiectivesize. of'said exhaustopening'1'11:

devic I Q 9'. A'gas engine. comprising an exp "cylinder having aninletport"throu 'end thereof aiic 1 side, a feed cylinder, aconnectingpipe leadvary the eifectiveisize of said port, a var i-.

cylinderliaving an exhaust port, a valve -to spark, and meansfor/varying the eifective size of the exhaust port in accordance withdevice for the spark, and means for-varying,

liaust opening 'in' accordance with the posi 4. A gas engine, comprisinganexplosion cylinder having an'exhaust port, a valve to set to controlthe time ofthe spark, and a l nk connection between .the valve and saidengine, and a contact device adapted to be.

' the and "a connection between said in difi'erent-posit-ions ontlieshaft, and a link connection between the contactdevice an intakeport at one end, aridan exl'iaiifst from the'fecd cylinder to the'intakeport of the explosion cylindema double pist on for. said cylinders, anexhaust openingthrough "accordance with the positionof the timing 12 Iing from the feed cylinder to the inlet port of. the explosion.cylinder, a check valve for said inlet port, a .double piston for saidcylinders, a centrally arranged crank in said piston to operate thesame, a valve to vary the eifective size of the exhaust-port, an

' ignition device having an perat-ing' handle cylinder, 9, piston,

I is

an said explosion for timing the spark, and a connection beween saidhandle and the valve controlling the'exhaust-port. 1 10, A gas engine,Comprising an explosion a feed cylinder in which the gas is compressedwith a back stroke of the piston, means for introducing the gas 1 fromthe feed cylinder. into the explosion cylinder at times determined bythe pressure cylinder and ,means for varying the exhaust from theexplosion cylinder in accordance wit-hthe speed at which the engine isrunning. 4 I

11,. A gas enginecomprising an explosioncylinder and apiston, saidcylinder having I an intake port and anexhaust port; a feed I cylinder,.means for introducing the gas from the feed cylinder into the explosioncylinder, means ton-varying the efiective size of the exhaust/portof-the; explosion cylinder, a disk. fitted within said feed-cylinder,

and means for adjusting the position of the disk so asto vary theeffective size of the feed cylinder; 'the volumetric contents of saidfeed-cylinder being atall times greater than that of the explosioncylinder, whereby the pressure of the gas introduced into the lattermay-be increased without diminution of the amount of the charge.

12. In a gas engine the combination with an explosion cylinder and apiston, of means for varying the speed at which the, engine is run, andmeans operated by said last named means for correspondingly varying the;discharge ofburnt gases from the explosion cylinder.- e 13. In a gasengine, the combination with an explosion cylinder and piston, of atiming device for the spark and means for *varying the discharge ofburnt gases from the; explosion cylinder in accordance with the positionof the timing device. I

- 14. In a gas engine, the combinationwith an explosion cylinderandpiston,-of means f comprising a spring pressed -valveg set intiperatlon by a decrease 1n] pressure in the explosion cylinder after anexplosionv for introducing fresh. charge of gas, means for "varying thedischarge of, burnt gases from said explosion cylinder in accordance:withthe speed of the engine, and means for vary-;

ing the amount of the fresh charge introduced into theexplosion-cylinder.

15. In a gas-engine, the combination with an explosion cylinder andpiston, of means comprising a spring pressed valve set in oporation byadecrease in-pressure in the ex-' 3 v: 6

plosion c linder after an explosion, for invalve for the explosion aninlet troducing a fresh charge of gas, means for varying the dischargeof burnt gases from said explosion cylinder inacoordance with thespeedof the engine, and means for varying the amount of the fresh chargeint-roduced into the explosion cylinderin accordance with thespeed ofthe engine.

16. In a gas engine, the combination with an explosion cylinder, of afeed cylinder, a

conduit between the same,- pistons in'said cylinders which operatetogether, means for varying the size of the feed cylinder rela-' tive toany given position of its piston,,and means for varying the discharge ofburnt gases from the explosion cylinderin accordance w1t-hthe speed ofthe engine.

17- In a gas engine, the combination with 1 an explosioncylinder, of ateed cylinder,a

cylinders which operate together, an inlet valve for the-explosioncylinder arranged to be opened by pressure, der provided with .anexhaust port,v and means operated bv the timing device for the spark forvarying the eifective crosssec clonal-area of said exhaust port;

18. In a gas-engine, the combinationwith an explosion cylinder, of afeed cylinder, a

conduit between the same, pistons in said cylinders which operatetogethenan inlet cylinder. arranged to be opened by pressure, saidexplosion cylin der provided with an exhaustjport, means for varying theeffective cross-sectional area of said exhaust port, a valve between thefeed cylinder andsaid inlet valve, and a governor to control the same inaccordance I with the speed of the engine. 3

n a; gas engine, the combination with 19. I an explosion cylinder, of a'feed cylinder, pistons 111 said cylinders which operate'td. gether,aconduit leading from the feed cyl- -c0nduit between the same, pistonsin said 7 said explosion cylin inder, into theend of the explosioncylinder,

valve for the explosion cylinder which is opened by pressure,saidexplosion cylinder being provided with an "exhaustl port, mean's forvarying the eflec-t-ive cross-- sectional area of said exhaust port,avalve interposed .in said conduit between the feed cylinder and. saidinlet valve, and a, gov-.

.ernor to control the position of the inlet valve in engine. i

20.- In a gas engine,- the combination with accordance with the speedof; the

an explosion cylinder, of a feed cylinder,- pistons in said cyllnderswhich'operate together, a conduit leading from. the feed cylinder intothe end ofthe explosion cylinder, an inlet valve *for the explosioncylinder whichis opened by pressure, said explosion cylinder beingprovided with an exhaust port, means for varying the effectivecrosssectional area of said exhaust port, a valve interposed insaidoconduitbetween the feed cylinder and, said inlet valve,a governorto controi' the position of the inlet Valve in no 1 cordance with thespeed'ofthe engine, a timing device for the spark, and connectionsbetween the tuning device and said meanseiiect ire size of the latter inweer-done*ewith with 2e 5 for varyin'g the cross-sectional area of thethe speednt Which the engine is'renning; a'

exhaust port, whereby the position of the feed cylinder, pistons whichworksinni-lta- 25 former determines the position oi the letter. neouslyin saidcylinders, and means for ;.Z1 A- gas engine comprising anexplosioh arying the effective size of the feed cy1incy ee.- heving aninlet port and an outlet tier the volumetric contents of the feed cylnport, means for varying the effective size of' iinie being ataii-tiniesgreeter than thet of th'eiatter port in ziccorclanc'e with thespeed the gxpiosion cylinder, so that h filers-easing;- 3e

dat w'hich the engine isrunning, means for ,corhpresemgjqthe gasheforeit enters the explosion cylinder, a conduit leading from saidcompressing, means to the inlet port of said explosion cylinder, and agovernor comprising a valve interposed in' said conduit, the position ofwhich isva'ried in accordance with the speed of the engine.

7 meet in correction as follows:

the eftective size of the feed creased pressure is obtained. in sionhylinder' Withoiit any dillli} amount of the charge;

rADAM -Mw Cs? -Witnesses-z P. HJTRUMA H. L. PEcK.

It is hereby certified that in Letters Patent No. 1,043,221, grantedNovember 1912, open the application of Adam M. G ihs on, of Chicago,Illinois, for an i nprore v Gas-Engines, errors appear in the printed.specification requiring Page 6, line 88, after the word port insert thenm'cis (a timing ale'mcefor the spark; same page, line,91, after thew0rd"'p0rt insert the words in accordance with th position of thetiming-device, -and same page, line 102', t after the word same a ndline117, after the vWon. valve insert the word auto --matically; and thatthe said Letters Patent should be reedvi'ith these corrections inLetters iatent No, 1,043,221.-

therein', that the Seine n my conform to the record of the case inthePatentOfiicef I Signed and seeledthis 31st day of December, A. D.,1912,. 3 8%. 0.0. BILLINGS,

Acting; Omnmissiqnr QfPat nta.

controi' the position of the inlet Valve in no 1 cordance with thespeed'ofthe engine, a timing device for the spark, and connectionsbetween the tuning device and said meanseiiect ire size of the latter inweer-done*ewith with 2e 5 for varyin'g the cross-sectional area of thethe speednt Which the engine is'renning; a'

exhaust port, whereby the position of the feed cylinder, pistons whichworksinni-lta- 25 former determines the position oi the letter. neouslyin saidcylinders, and means for ;.Z1 A- gas engine comprising anexplosioh arying the effective size of the feed cy1incy ee.- heving aninlet port and an outlet tier the volumetric contents of the feed cylnport, means for varying the effective size of' iinie being ataii-tiniesgreeter than thet of th'eiatter port in ziccorclanc'e with thespeed the gxpiosion cylinder, so that h filers-easing;- 3e

dat w'hich the engine isrunning, means for ,corhpresemgjqthe gasheforeit enters the explosion cylinder, a conduit leading from saidcompressing, means to the inlet port of said explosion cylinder, and agovernor comprising a valve interposed in' said conduit, the position ofwhich isva'ried in accordance with the speed of the engine.

7 meet in correction as follows:

the eftective size of the feed creased pressure is obtained. in sionhylinder' Withoiit any dillli} amount of the charge;

rADAM -Mw Cs? -Witnesses-z P. HJTRUMA H. L. PEcK.

It is hereby certified that in Letters Patent No. 1,043,221, grantedNovember 1912, open the application of Adam M. G ihs on, of Chicago,Illinois, for an i nprore v Gas-Engines, errors appear in the printed.specification requiring Page 6, line 88, after the word port insert thenm'cis (a timing ale'mcefor the spark; same page, line,91, after thew0rd"'p0rt insert the words in accordance with th position of thetiming-device, -and same page, line 102', t after the word same a ndline117, after the vWon. valve insert the word auto --matically; and thatthe said Letters Patent should be reedvi'ith these corrections inLetters iatent No, 1,043,221.-

therein', that the Seine n my conform to the record of the case inthePatentOfiicef I Signed and seeledthis 31st day of December, A. D.,1912,. 3 8%. 0.0. BILLINGS,

Acting; Omnmissiqnr QfPat nta.

